Stress-induced alterations in hippocampal plasticity, place cells, and spatial memory

Jeansok J. Kim, Hongjoo J. Lee, Adam C. Welday, Eun Young Song, Jeiwon Cho, Patricia E. Sharp, Min W. Jung, Hugh T. Blair

Research output: Contribution to journalArticlepeer-review

98 Scopus citations


Acute, inescapable, and unpredictable stress can profoundly modify brain and cognition in humans and animals. The present study investigated the ensuing effects of 2-h variable "audiogenic" stress on three related levels of hippocampal functions in rats: long-term potentiation, place cell activity, and spatial memory. In agreement with prior findings, we observed that stress reduced the magnitude of Schaffer collateral/commissural-Cornu Ammonis field 1 long-term potentiation in vitro, and selectively impaired spatial memory on a hidden platform version of the Morris water maze task. We also observed that stress impaired the stability of firing rates (but not firing locations) of place cells recorded from dorsal Cornu Ammonis field 1 in rats foraging freely on a novel open-field platform located in a familiar surrounding room. These findings suggest that stress-induced modifications in synaptic plasticity may prevent the storage of stable "rate maps" by hippocampal place cells, which in turn may contribute to spatial memory impairments associated with stress.

Original languageEnglish
Pages (from-to)18297-18302
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number46
StatePublished - 13 Nov 2007


  • Consolidation
  • Corticosterone
  • Hippocampus
  • Long-term potentiation
  • Single unit


Dive into the research topics of 'Stress-induced alterations in hippocampal plasticity, place cells, and spatial memory'. Together they form a unique fingerprint.

Cite this